排序方式: 共有49条查询结果,搜索用时 15 毫秒
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基于双通道(罗经通道和惯导通道)的光纤陀螺捷联罗经系统软件设计,罗经通道通过在水平回路及罗经回路中加阻尼控制环节校正姿态角,当载体进行复杂机动航行时,系统自动切换到无阻尼惯导通道,以有效减小机动误差,并通过等效分析法确定加速度阈值实现两通道的自动切换。两种工作通道的仿真结果表明罗经通道与惯导通道相比,可以更好地抑制系统的舒勒周期振荡和地球周期振荡,对惯性器件的随机噪声产生的误差积累也有较好的抑制作用。通过系统工程样机在三轴转台环境下的测试,基本验证了双通道软件的正确性和系统样机硬件的可靠性,测试结果表明该罗经系统具有较高的姿态精度。 相似文献
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根据北斗卫星系统特有的信息传输特征,本文研究了在北斗灾害预警信息发布系统中采用应用层前向纠错(FEC)技术能够成功提高预警信息传输的准确性。仿真结果表明预警信息的成功传输率可到达99.99%以上。所得到的结论对于北斗灾害预警信息发布系统中的参数选择及性能优化具有指导意义。 相似文献
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全罗盘画面反走样算法的研究和实现 总被引:8,自引:1,他引:7
在一定分辨率的屏幕上,用常规画线函数生成的静态罗盘刻度线呈现出锯齿形失真,特别当罗盘作动态旋转时,刻度线扭曲,变形,为消除这一现象,笔者根据线条的反走样原理,提出了一种实用算法,消除了静态的锯齿形失真,并从CRT屏幕上仿真的动态效果来看,罗盘刻度线旋转时不扭曲,不变形,实验证明,在光栅图形显示器中,应用此算法可消除走样,大大增强罗盘刻度线动态显示效果。 相似文献
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《中国航空学报》2021,34(4):332-340
Bionic adhesives with tip-expanded microstructural arrays have attracted considerable interest owing to their high adhesive performance at low preloads. Their mainstream manufacturing method is molding. Due to most molds are made of silicon or silicon-based soft templates, and have poor wear resistant or vulnerability to high temperature, limiting their use in large-scale manufacturing. Nickel is widely used as an embossing mold in the micro/nano-imprint industrial process owing to its good mechanical properties. However, the processing of metal molds for the fabrication of tip-expanded microstructural arrays is extremely challenging. In this study, using electrodeposition techniques, the shape of the micropores is modified to obtain end-controlled pores. The effect of the non-uniformity of the electric field on the microporous morphology in the electrodeposition process is systematically investigated. Furthermore, the mechanism of non-uniformity evolution of the microporous morphology is revealed. The optimized microporous metal array is used as a mold to investigate the cavity evolution laws of the elastic cushions under pre-load during the manufacturing process. As a result, typical bionic adhesives with tip-expansion are obtained. Moreover, corresponding adhesion mechanics are analyzed. The results show that electrochemical modifications have broad application prospects in the fabrication of tip-expanded microstructures, providing a new method for the large-scale fabrication of bionic adhesives based on metal molds. 相似文献
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仿生导航技术是一种模仿动物导航机理的新型导航技术,涉及认知科学、机器学习、计算机视觉和信息融合等多个学科。仿生导航因具有自主性好、自适应性强等特点,近年来成为了导航领域的研究热点之一。首先阐述了仿生导航的内涵,然后从仿生导航传感器技术和仿生导航方法两个方面简要介绍了国内外研究现状和发展趋势。其中,仿生导航传感器技术包括了仿生光罗盘、仿生磁罗盘、仿生复眼等内容;仿生导航方法主要涉及导航经验知识的表达与机器学习、仿生多源异质导航信息融合、面向任务的仿生路径规划与导航等。最后,对仿生导航技术进行了总结,并对未来发展进行了展望。 相似文献
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